Analog Devices Inc./Maxim Integrated MAX6380XR34

Overview

MAX6380XR34 from Maxim Integrated is an ultra-low-power, open-drain, active-low voltage detector optimized for 3.4V nominal supply monitoring in battery-powered systems. It features a factory-trimmed 3.400V threshold (±2.5% over temperature), 500nA supply current at +25°C, and guaranteed operation down to VCC = 1V. Used in portable equipment power supervision where precision reset assertion and minimal quiescent draw are critical.

For engineers reviewing the MAX6380XR34 datasheet, MAX6380XR34 pinout, MAX6380XR34 application, or MAX6380XR34 equivalent, key selection criteria include its 3.4V trip point, SC70-3 open-drain output configuration, ±2.5% threshold accuracy across -40°C to +85°C, immunity to sub-10µs VCC transients, and compatibility with 1.2V–5.5V logic pull-up voltages.

Technical Context

The MAX6380XR34 implements a precision bandgap reference and comparator with internally trimmed resistors to set a fixed 3.400V detection threshold. Its open-drain output asserts low when VCC falls below VTH and remains valid down to 1V supply - enabling reliable reset generation even during deep brownout conditions.

Designed for transient immunity, it ignores negative-going VCC glitches shorter than ~10µs at 100mV overdrive, per the Maximum Transient Duration vs. Threshold Overdrive curve. The device requires no external components and operates without trimming or calibration across its full industrial temperature range.

Key Specifications

Pinout & Package

MAX6380XR34 is housed in a 3-pin SC70-3 package (2.0mm × 2.1mm × 0.95mm), optimized for space-constrained portable designs. Pin 1 is GND, Pin 2 is OUT (open-drain, active-low), and Pin 3 is VCC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage detector applications.

Compared with TLV803EB34DBZR and APX803S-34SA-7, the MAX6380XR34 delivers the lowest supply current (500nA) in an SC70-3 package while retaining open-drain flexibility and guaranteed 1V operation - making it optimal for ultra-low-power, space-constrained designs where long-term battery integrity is non-negotiable.

Availability

MAX6380XR34 is available at Aetrix Electronics and suitable for portable medical sensors, wearables power sequencing, and industrial wireless nodes requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for MAX6380XR34 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and computing applications.

The MAX6375–MAX6380 family was engineered specifically for ultra-low-power voltage supervision in battery-critical systems - delivering factory-trimmed thresholds, nanoscale current draw, and robust transient immunity in miniature SC70/SOT23 packages.

FAQ

What is the exact factory-trimmed threshold voltage of the MAX6380XR34?

The MAX6380XR34 has a nominal reset threshold voltage of 3.400V, with ±2.5% accuracy over the full industrial temperature range (-40°C to +85°C). This value is laser-trimmed at wafer test and verified per Table 1 in the datasheet, where suffix "R34" explicitly denotes the 3.400V variant within the MAX6380 series. The MAX6380XR34 maintains this specification without external calibration.

Does the MAX6380XR34 require an external pull-up resistor on its OUT pin?

Yes, the MAX6380XR34 features an open-drain active-low output, so an external pull-up resistor is mandatory for proper logic-level translation. The pull-up may connect to any supply between 1.2V and 5.5V, and must be sized to ensure VOL ≤0.4V at ISINK = 100µA (per Electrical Characteristics). Typical values range from 10kΩ to 100kΩ depending on bus capacitance and rise-time requirements.

Can the MAX6380XR34 operate reliably below 1.2V supply voltage?

No - while the MAX6380XR34 guarantees correct output logic state down to VCC = 1V, its specified operating range begins at 1.2V. Below 1.2V, the internal bandgap reference and comparator may not function predictably, and propagation delay or threshold accuracy is not characterized. For designs requiring sub-1.2V supervision, alternate solutions such as the MAX6375 series (2.2V–3.08V variants) should be evaluated.

How does the MAX6380XR34 handle fast voltage transients on the VCC line?

The MAX6380XR34 incorporates built-in transient immunity: it ignores negative-going VCC glitches shorter than approximately 10µs when the overdrive (VTH – VCC) is 100mV, per the "Maximum Transient Duration vs. Threshold Overdrive" graph. This prevents false resets caused by switching noise or load-step events, ensuring robust operation in electrically noisy environments like motor-driven or RF-intensive systems.

Is the MAX6380XR34 available in both leaded and lead-free packaging?

Yes - the MAX6380XR34 is offered in both leaded and RoHS-compliant lead-free versions. To order the lead-free variant, replace the standard "-T" suffix with "+T" (e.g., MAX6380XR34+T). Both versions use the same SC70-3 package outline and share identical electrical specifications, thermal characteristics, and reliability data per Maxim's qualification standards.